EKG EXAM WITH CORRECT
ANSWERS 2025
EKG or ECG stands ( correct answers )
for: electrocardiogram
What can an EKG detect? ( correct answers ) cardiac arrhythmia or
dysrhythmia, ischemia, electrolyte imbalance, effects of cardiac
medications, damage caused by an MI
Define arrhythmia ( correct answers ) abnormal cardiac rhythm (think a=
without, without rhythm)
Define ischemia ( correct answers ) lack of blood supply
What is the electrical pathway of the heart's conduction system?
( correct answers ) SA node->AV node->Bundle of His->Right and Left
Bundle Branches->Purkinje fibers
When the SA node is stimulated, what mechanical action happens in
the heart?
( correct answers ) Atria contract
What has to happen for the ventricles to contract? ( correct answers )
Electrical conduction has to pass through the AV node, down the Bundle of
His, through the right and left bundle branches, into the purkinje fibers.
Once they reach the Purkinje fibers, then the ventricles will contract.
Electrodes ( correct answers ) sticky skin sensors that attach to the
patient
What is the purpose of the gel on the electrodes? ( correct answers )
to read the heart's electricity and to amplify the waveforms
EKG machine is also called an: ( correct answers )
electrocardiograph
Name the 2 types of EKG machines: ( correct answers ) Single
channel and multichannel
When we do an EKG we are looking at the heart from : ( correct
answers ) 12 different points of view or angles
How many electrodes are used to perform an EKG? ( correct
answers ) 10
GRADED
A+
What is an amplifier? ( correct answers ) Magnifies the heart's electrical
signal so it can be recorded.
, What is the stylus? ( correct answers ) records the
motion on the graph paper by burning the impression into the heat-
sensitive paper.
Name the limb leads. ( correct answers ) RA, LA, LL, RL
What is unique about EKG paper? ( correct answers ) It is head-
sensitive and pressure-sensitive.
How big is a small block on EKG paper? ( correct answers )
1mm x 1 mm How big is a large block on EKG paper?
( correct answers ) 5mm x 5 mm
What speed does normal EKG paper run?( correct answers )
25mm per second
Why would a CCMA increase the speed of the EKG paper? ( correct
answers ) If the heart rate were very fast, the speed would be increased
to 50mm per second.
How much TIME does each small square on EKG paper represent?
( correct answers
) 0.04 seconds
How much TIME does each large square on EKG paper represent?
( correct answers
) 0.2 seconds
What is another name for amplitude? ( correct answers ) Gain
Define amplitude/gain. ( correct answers ) how tall the tracing is. It is
represented by 1x, 2x, or 3x.
How big is the normal amplitude/gain on an EKG? ( correct answers ) 2
large boxes or 10 small boxes
What is the purpose of standardization? ( correct answers ) it is the
process of making sure that an EKG on one machine will compare to the
EKG on another machine.
What does the standardization mark look like? ( correct answers )
Upside down U or a rectangle with the bottom out of it.
Name the chest or precordial leads (wires): ( correct answers ) V1,
GRADED
V2,
A+ V3, V4, V5, V6
What are the leads RA, LA, RL, LL collectively called? ( correct
answers ) Limb leads
A 6 second strip in Lead II is called a ( correct answers ) rhythm
ANSWERS 2025
EKG or ECG stands ( correct answers )
for: electrocardiogram
What can an EKG detect? ( correct answers ) cardiac arrhythmia or
dysrhythmia, ischemia, electrolyte imbalance, effects of cardiac
medications, damage caused by an MI
Define arrhythmia ( correct answers ) abnormal cardiac rhythm (think a=
without, without rhythm)
Define ischemia ( correct answers ) lack of blood supply
What is the electrical pathway of the heart's conduction system?
( correct answers ) SA node->AV node->Bundle of His->Right and Left
Bundle Branches->Purkinje fibers
When the SA node is stimulated, what mechanical action happens in
the heart?
( correct answers ) Atria contract
What has to happen for the ventricles to contract? ( correct answers )
Electrical conduction has to pass through the AV node, down the Bundle of
His, through the right and left bundle branches, into the purkinje fibers.
Once they reach the Purkinje fibers, then the ventricles will contract.
Electrodes ( correct answers ) sticky skin sensors that attach to the
patient
What is the purpose of the gel on the electrodes? ( correct answers )
to read the heart's electricity and to amplify the waveforms
EKG machine is also called an: ( correct answers )
electrocardiograph
Name the 2 types of EKG machines: ( correct answers ) Single
channel and multichannel
When we do an EKG we are looking at the heart from : ( correct
answers ) 12 different points of view or angles
How many electrodes are used to perform an EKG? ( correct
answers ) 10
GRADED
A+
What is an amplifier? ( correct answers ) Magnifies the heart's electrical
signal so it can be recorded.
, What is the stylus? ( correct answers ) records the
motion on the graph paper by burning the impression into the heat-
sensitive paper.
Name the limb leads. ( correct answers ) RA, LA, LL, RL
What is unique about EKG paper? ( correct answers ) It is head-
sensitive and pressure-sensitive.
How big is a small block on EKG paper? ( correct answers )
1mm x 1 mm How big is a large block on EKG paper?
( correct answers ) 5mm x 5 mm
What speed does normal EKG paper run?( correct answers )
25mm per second
Why would a CCMA increase the speed of the EKG paper? ( correct
answers ) If the heart rate were very fast, the speed would be increased
to 50mm per second.
How much TIME does each small square on EKG paper represent?
( correct answers
) 0.04 seconds
How much TIME does each large square on EKG paper represent?
( correct answers
) 0.2 seconds
What is another name for amplitude? ( correct answers ) Gain
Define amplitude/gain. ( correct answers ) how tall the tracing is. It is
represented by 1x, 2x, or 3x.
How big is the normal amplitude/gain on an EKG? ( correct answers ) 2
large boxes or 10 small boxes
What is the purpose of standardization? ( correct answers ) it is the
process of making sure that an EKG on one machine will compare to the
EKG on another machine.
What does the standardization mark look like? ( correct answers )
Upside down U or a rectangle with the bottom out of it.
Name the chest or precordial leads (wires): ( correct answers ) V1,
GRADED
V2,
A+ V3, V4, V5, V6
What are the leads RA, LA, RL, LL collectively called? ( correct
answers ) Limb leads
A 6 second strip in Lead II is called a ( correct answers ) rhythm
